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Combined ADHD and Autism Assessments

What is a Combined ADHD and Autism Assessment? 

Many adults go through a large portion of their lives unaware that they are multiply neurodivergent, with both the Autistic and ADHD brain styles (AuDHD). ADHD and Autism commonly present together, and in many cases, can be unnoticed during childhood and adolescence, due to misinformation about how Autistic and ADHD traits present when combined, gender biases in research, and long-term masking behaviours.


Individuals who were not identified as AuDHDer’s in childhood, can be assessed and identified, in adulthood.


A combined Autism and ADHD assessment involves a combination of assessment tools, in addition to a clinical interview, to determine whether an individual has both the Autistic and the ADHD brain style.

Components of an Combined ADHD and Autism Assessment

A full comprehensive Autism and ADHD assessment incorporates the following:

  1. Intake and Clinical Interview with the individual, and if appropriate, their loved ones

  2. Diagnostic Interview for Autism (MIGDAS-2)

  3. Social functioning Assessment (SRS-2)​

  4. Adaptive Behaviour Assessment (Vineland III)

  5. Diagnostic Interview (DIVA-5)

  6. Diagnostic Self-Report Assessment (CAARS)

  7. Full Educational Assessment (WAIS IV and WIAT III)



  1. If identified as appropriate or required - an additional assessment / screener tool for other mental health conditions common to AuDHDers.

  2. Comprehensive strengths-focused and tailored report that details the assessment outcome with targeted recommendations.

  3. Feedback session with the individual and, if desired, their loved ones

Measures used in the Combined ADHD and Autism Assessment

Monteiro Interview Guidelines for Diagnosing Autism Spectrum - Second Edition

The Monteiro Interview Guidelines for Diagnosing Autism Spectrum - Second Edition - (MIGDAS-2) is a qualitative interview protocol for determining whether an individual’s behavioural profile is consistent with the Autistic Brain Style.

The MIGDAS-2 collects information about an individual’s sensory, communication, social, and emotional profile. It is intended for use with verbally fluent adults.

The MIGDAS-2 takes a strengths-based approach and acknowledges the whole person.

ADHD Assessment Breakdown

The full comprehensive Autism and ADHD assessment is used to support formal diagnosis of Autism in adults and can be used in combination with a psychiatric consultation to obtain a formal diagnosis of ADHD. This assessment provides an in-depth assessment of how an individual’s brain is functioning, and how they can best support their brain across various contexts of living. It can be used to support an NDIS application for Autistic Adults.


While the full comprehensive Autism and ADHD assessment is available, it may not be necessary for every individual. An initial intake interview will be used to determine which assessment pathway is likely to be most appropriate for you, and for your intended purposes for undergoing the assessment.


Following any assessment, your Psychologist will provide a comprehensive report explaining all the tests that were used, along with the results, and a list of recommendations for home, educational and/or work settings.

A 30 minute to 1 hour feedback session is then held, to explain the results, go through the report and answer any additional questions.


This session can be used for planning further assessment or intervention, if required.


1 hour interview to gather background information, clarify the purpose of assessment, and to determine the most appropriate battery of assessments for the individual.


Vineland Adaptive Behaviour scales completed online by a loved one.


Approx. 2 hours of testing with WAIS-IV and WIAT-lll each (may need to be done over 2 separate occasions)


3 hour diagnostic interview with the MIGDAS-2 (may be done over two separate occasions)


1 – 1.5 hour diagnostic interview with the DIVA-5 (may include a loved one who was present during the individuals childhood)


Detailed assessment report of findings with behavioural and educational recommendations


SRS-2 completed online by the individual and a loved one


10-15 minute self-report assessment with CAARS



Up to 1 hour feedback session

Want to find out more?

To learn more or to enquire about our combined ADHD and Autism assessment, contact us at:, or give us a call on (02) 9555 4810.

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